/Engine/Source/Runtime/Engine/Classes/Materials/MaterialExpression.h
Returns the statement for the expression connected to this input
bool GenerateHLSLStatements ( [FMaterialHLSLGenerator](API\Runtime\Engine\FMaterialHLSLGenerator) & Generator, [UE::HLSLTree::FScope](API\Runtime\Engine\HLSLTree\FScope) & Scope ) const